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Mould Survey
Find out why the mould keeps coming back, and what it will take to deal with it.
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Independent mould surveys and fogging across London
Mould surveys in London that find the real cause.
Find out why the mould keeps coming back, get a clear plan to deal with it, and never be pushed into work you don't need.
- IICRC qualified
- Dewpoint Professional
- 3M Window Film Trained
Simply Filtered is an independent mould and condensation assessment service covering London inside the M25. Duncan Ridley, qualified in water damage restoration (IICRC) and mould remediation (Dewpoint Professional), carries out mould surveys, antimicrobial fogging and window film surveys, with written reports that explain what's causing the problem and what to do next.
Services
What we do.
Independent surveys and treatments for homes across London, each with a clear written answer.
After mould or a leak
Antimicrobial Fogging
Freshen your rooms before you redecorate or move back in.
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Before you buy film
Window Film Survey
Get the right film for your windows, first time, with every pane measured.
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After a leak or flood
Water Damage Assessment Report
An independent report on what your home needs after the water.
Learn moreLandlord or letting agent? See how a survey helps when a tenant reports mould
How it works
From your enquiry to your report.
Send the form
About 2 minutes. Tell us what's going on in your own words.
Get your free quote
We reply with the price and what's included. No obligation to go ahead.
The visit
If you're happy with the quote, Duncan visits at a time that suits you and takes the readings.
Your report
The cause, and what it will take to deal with it.
No obligation to use anyone we recommend. If your plan needs building or ventilation work, you choose who does it.
Get a free quote
Or call 07366 199261
What a mould survey measures
One room, measured in the order we work.
Tap a number to see what gets measured there.
As you live in it
Where you see the mould
You show us where the mould appears and how the room gets used: washing drying, cooking, showers, when the heating's on. That's where the readings start.
The air
Relative humidity
How much moisture your air is holding, compared with the most it could hold at that temperature.
- Measured in
- The rooms you're worried about
- Tells you
- Whether the air itself is the problem
The tipping point
Dew point
The temperature at which that moisture turns to water on a surface.
- Worked out from
- Humidity and air temperature
- Tells you
- Which of your surfaces are at risk
The surfaces
Surface temperatures
How cold your walls, ceilings and window reveals really are. Cold spots are where condensation settles first, often before any mould shows.
- Checked
- Walls, ceilings, corners and reveals
- Tells you
- Where your cold spots are
The answer
Cause and plan
Put together, your readings show where condensation forms and why. Your report sets out what it will take to deal with it: usually better ventilation, sometimes insulating one cold area.
- You get
- A written report
- Obligation
- None
Image: Duncan Ridley of Simply Filtered taking readings on a survey
Every visit, every report
About Simply Filtered
Survey-led advice, from someone who knows buildings.
Simply Filtered is a mould, condensation and water damage service covering London inside the M25. Every survey is carried out by our founder, Duncan Ridley. Duncan spent 18 years as a technical advisor in the heating industry, has a long background in construction and heating systems, and has professional experience in structural drying, flood remediation and building fabric diagnostics.
So when we look at your home, we're looking at how the building handles heat and moisture, not just the mould on the wall.
The survey stands on its own. Your report sets out what we found and what we recommend, and you're free to act on it however you choose. If you'd like help afterwards, we carry out antimicrobial fogging ourselves, and where strip-out or drying is needed we can arrange it through trusted partners, who may pay us a referral fee. We'll always tell you who would carry out the work and whether we have an interest before you agree to anything, and there's never any obligation.
- IICRC
- Water Damage Restoration Technician
- Dewpoint Professional
- Mould Remediation
Areas we cover
Based in west London. Covering everywhere inside the M25.
Including:
- Ealing
- Fulham
- Wandsworth
- Chiswick
- Notting Hill
- Kensington
- Chelsea
- Hammersmith
- Shepherd's Bush
- Maida Vale
- Kilburn
- Camden
Why most problems don't need major work
Measure it first. Treat the cause.
In our experience, most mould problems don't need major work. They need the right approach in the right place, and that usually means better ventilation, heating or insulation.
Most mould grows where moisture in the air meets a surface cold enough to turn it into water. Find those surfaces, and the reason they're cold, and you know where to focus.
That's what a mould survey does. Your readings show where moisture is building up in your home, what's most likely causing it, and what's needed to bring it under control.
See what a survey includesQuestions
Questions you might have.
How much does a mould survey cost?
A mould survey includes the visit and your written report. The price depends on your home. Send the form for a free quote, with the exact price and what's included, before anything is booked.
Will you try to sell me work?
No. Building, repair and ventilation work aren't part of the service, so there's nothing to sell you beyond the survey.
If your plan does need work, you're free to use anyone you like, with no obligation to use anyone we recommend.
Is it just condensation?
Often it is. The survey tells you why moisture is condensing in that particular spot, which is what you need to know to deal with it.
If your readings point to something else, like a leak or rising damp, your report says so and tells you which specialist to call.
Does antimicrobial fogging get rid of mould?
Not on its own. Fogging reduces mould spores in the air and on surfaces, which makes it a useful hygiene step after mould, a leak or a clean-up. It doesn't fix what's causing the mould, and it isn't guaranteed to stop mould coming back.
If you don't know the cause yet, start with a mould survey.
Does the window film survey include the film?
No. The survey is a diagnostic assessment and does not include installation or film supply. Toughened glass is reported as "toughened" or "not toughened". The survey does not certify glass as safety glass or as meeting any British Standard.
You can take your report to your own film supplier or installer, or ask us to pass it to local suppliers who can advise and quote.
Do you cover my area?
If you're in London inside the M25, yes, wherever you are in the city.
If you're just outside the M25, get in touch and you'll get an honest answer on whether a visit is possible.
Next step
Tell us what's going on.
Your enquiry takes about 2 minutes, or you can send a WhatsApp message instead. You're under no obligation to use anyone we recommend.
Or call 07366 199261